[Webservice] Filter By Exclusion

[El_Matella]

Hi,

 

I am working with the webservice and I am trying to retrieve products filtering them by exclusion. Here is an example, I have the following products in my database:

{
    id: 1,
    reference: 090a76ef0635366760060b114ffcd1cd
},
{
    id: 2,
    reference: 299
}

I would like to retrieve only the products that have a reference like the second product.

As you can see, I have to kind of references, the first product has got a very long reference and the second one has an integer reference. 

 

I am not against diving into the override of functions in Prestashop.

 

How could I achieve that or where could I look for information?

 

Thanks a lot for your answers, and have a nice day!